One of the more distinctive features of a house cat is its weird vertical pupils, which don't seem all that weird to us because we are really familiar with cats. Maybe that's why the Pallas' cat seems so strange to us with their round pupils. But pupil shapes vary all along the spectrum of the animal kingdom, and each shape has a purpose for the lifestyle of its owners. In the TED-Ed video, we learn about pupil shapes in a variety of animals, including the extremely weird rectangular pupils of a goat. I was familiar with the shape, but I didn't know goats kept their pupils at the same angle when they moved their heads! And if you think that's weird, wait until they get to praying mantises. -via Laughing Squid
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bit about the goat is interesting
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